<template>
    <div class="sidebar">
        <el-menu
            class="sidebar-el-menu"
            :default-active="onRoutes"
            :collapse="collapse"
            background-color="#324157"
            text-color="#bfcbd9"
            active-text-color="#20a0ff"
            unique-opened
            router
        >
            <template v-for="item in items">
                <template v-if="item.children">
                    <el-submenu :index="item.menuIndex" :key="item.menuIndex">
                        <template slot="title">
                            <i :class="item.menuIcon"></i>
                            <span slot="title" class="menu-span-level">{{ item.menuTitle }}</span>
                        </template>
                        <template v-for="subItem in item.children">
                            <el-submenu
                                v-if="subItem.children"
                                :index="subItem.menuIndex"
                                :key="subItem.menuIndex"
                            >
                                <template slot="title">
                                    <span slot="title" class="menu-span">{{ subItem.menuTitle }}</span>
                                </template>
                                <el-menu-item
                                    v-for="(threeItem,i) in subItem.children"
                                    :key="i"
                                    :index="threeItem.menuIndex"
                                >
                                    <span slot="title" class="menu-span">{{ threeItem.menuTitle }}</span>
                                </el-menu-item>
                            </el-submenu>
                            <el-menu-item
                                v-else
                                :index="subItem.menuIndex"
                                :key="subItem.menuIndex"
                            >
                                <span slot="title" class="menu-span">{{ subItem.menuTitle }}</span>
                            </el-menu-item>
                        </template>
                    </el-submenu>
                </template>
                <template v-else>
                    <el-menu-item :index="item.menuIndex" :key="item.menuIndex">
                        <i :class="item.menuIcon"></i>
                        <span slot="title" class="menu-span-level">{{ item.menuTitle }}</span>
                    </el-menu-item>
                </template>
            </template>
        </el-menu>
    </div>
</template>

<script>
import bus from '../common/bus';
import { sidebarData } from '../../api/sidebar/sidebar';
export default {
    data() {
        return {
            collapse: false,
            items: [],
            success:false,
            data:[],
            query: {
                userAcct: localStorage.getItem('ms_userAcct'),
            },
        };
    },
    computed: {
        onRoutes() {
            return this.$route.path.replace('/', '');
        }
    },
    created() {
        // 通过 Event Bus 进行组件间通信，来折叠侧边栏
        bus.$on('collapse', msg => {
            this.collapse = msg;
            bus.$emit('collapse-content', msg);
        });
        this.getData();
    },
    methods: {
        // 获取后台数据
        getData() {
            console.log("获取菜单",this.query);
            sidebarData(this.query).then(response => {
                if (response.success==true){
                    this.items =response.data;
                } else {
                    this.$message.error("菜单获取失败！");
                    this.items = [];
                }
            }).catch((e)=>{
                console.log(e)
            });
        }
    }
};
</script>

<style scoped>
.sidebar {
    display: block;
    position: absolute;
    left: 0;
    top: 70px;
    bottom: 0;
    overflow-y: scroll;
}
.sidebar::-webkit-scrollbar {
    width: 0;
}
.sidebar-el-menu:not(.el-menu--collapse) {
    width: 250px;
}
.sidebar > ul {
    height: 100%;
}
.menu-span {
    font-size: 16px
}
.menu-span-level{
    font-size: 17px
}
</style>
